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    Home / Products / Transceivers / NVIDIA InfiniBand Transceivers / 400G OSFP/QSFP112 InfiniBand NDR / 103831

    NVIDIA/Mellanox MMA4Z00-NS400 Compatible 400GBASE-SR4 OSFP RHS/Flat Top PAM4 850nm 50m DDM MPO-12/APC MMF Optical Transceiver Module for InfiniBand NDR (IB) and Ethernet (ETH) Used in ConnectX-7/OSFP Adapter Cards

    Product No: 103831
    3 Reviews
    218 Sold
    US$ 459.00
    Compatible
    Transceivers type
    40 in real-time stock, 11 Jun, 2026

    Free Shipping over US$ 79.8

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    5-Year Warranty 1-Year Exchange
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    Providing industry-leading limited lifetime warranty.
    Please check our warranty policy for details.
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    1. Support both InfiniBand NDR (IB) and Ethernet (ETH)
2. Support 800G to 2x 400G and 4x 200G breakout applications
3. VCSEL transmitter + PIN PD receiver
4. Hot-pluggable OSFP with MPO-12/APC connector
5. Max. data rate 425Gbps up to 50m over MMF
    See more

    Specifications

    NVIDIA/Mellanox MMA4Z00-NS400 Compatible 400GBASE-SR4 OSFP RHS/Flat Top PAM4 Optical Transceiver Module (850nm, 50m, Single-Port MPO-12/APC Connector, MMF, 0℃ to +70℃, DDM)

     

    NVIDIA/Mellanox MMA4Z00-NS400 Compatible 400GBASE-SR4 OSFP is a Flat Top (OSFP-RHS) transceiver module that supports a max data rate of 425 Gbps. It enables the fiber link of 50m over OM4 multi-mode fiber (MMF) with a single 4-channel MPO-12 APC optical connector. Adopting the Pulse-amplitude Modulation (PAM4) electrical and optical modulation, the Short Reach 4-channel (SR4) OSFP achieves 400 Gigabit Ethernet through 4-channels of 100G-PAM4. QSFPTEK manufactured SR4 OSFP complies with 400G InfiniBand NDR, OSFP MSA 5.0, CMIS 4.0, RoHS 2.0, IEEE 802.3ck, IEEE 802.3-2022. The DDM (digital diagnostics monitoring) function is supported on the 400G fiber optic transceiver to achieve real-time operating parameters monitoring. 

     

    This single-port 400G SR4 OSFP supports both InfiniBand NDR (IB) and Ethernet (ETH). While not for use in switches, it is designed for insertion into 400Gb/s ConnectX-7/OSFP-based PCIe-bus network cards to twin-port 800G transceivers in 2x400G IB/EN switches. Its most typical application scenario is: A pair of single-port flat top 400G SR4 OSFP (MMA4Z00-NS400) is independently connected to one of the connectors of the twin-port  800G 2x400G 2SR4 OSFP (MMA4Z00-NS) module in a Quantum-2 InfiniBand or Spectrum-4 Ethernet switch. The MMA4Z00-NS400 400G module can operate in either 400Gb/s or 200Gb/s speed modes, depending on the number of connected fiber optic cables. This allows for corresponding connectivity scenarios of 800G to 2x 400GBASE-SR4 and 4x 200GBASE-SR4 breakout applications, respectively.

     

    Part Number QT-OSFP-400G-SR4-RHS Vendor Name QSFPTEK
    Form Factor Single-port OSFP-RHS/Flat Top Max Data Rate 425Gbps (4x 106.25Gbps)
    Wavelength 850nm Distance 30m@OM3/50m@OM4/OM5
    Connector MTP/MPO-12/APC Cable Type MMF
    Transmitter Type VCSEL Receiver Type PIN PD
    TX Power -4.6 to 4 dBm Receiver Sensitivity < -6.4 dBm
    Packaging Technology COB (Chip on Board) Packaging Receiver Overload 4 dBm
    Power Consumption ≤9W Modulation Format 4x 100G-PAM4 electrical to 4x 100G-PAM4 optical Parallel
    Extinction Ratio 2.5dB CDR (Clock and Data Recovery) TX & RX Built-in CDR
    Application ConnectX-7/OSFP Adapter Cards MTBF 802091 Hours (@55°C, 90% FIT)
    1372251 Hours (@55°C, 60% FIT)
    DDM/DOM Supported Temperature 0 to 70°C (32 to 158°F)
    Protocols 400G InfiniBand NDR, OSFP MSA 5.0, CMIS 4.0, RoHS 2.0, IEEE 802.3ck, IEEE 802.3-2022 Warranty 5 Years
    Quality Testing Program
    Optical Transceivers Testing

    Take a look at our test program to get the reliable and high-performance optical transceivers.

    Quality Certifications

    Features

    • 1. Advanced Technology
      Features PAM4 modulation technology and built-in DSP chip.
    • 2. Best Price and High Quality
      Based on self-producing capacity and rigorous testing, QSFPTEK can provide cost-effective products with high reliability and performance at a trade price.
    • 3. Protocols
      Compliant with 400G InfiniBand NDR, OSFP MSA 5.0, CMIS 4.0, RoHS 2.0, IEEE 802.3ck, IEEE 802.3-2022.
    • 4. Quality Certifications
      Backed by CE, FCC, ROSH, ISO9001.

    Applications

    Scenario 1: Twin-port 2x400G OSFP IB/EN Switch to 2x 400G ConnectX-7/OSFP Connectivity

    Twin-port 2x400G OSFP IB/EN Switch to 2x 400G ConnectX-7/OSFP Connectivity

     

     

    Scenario 2: Twin-port 2x400G OSFP IB/EN Switch to 4x 200G ConnectX-7/OSFP Connectivity

    Twin-port 2x400G OSFP IB/EN Switch to 4x 200G ConnectX-7/OSFP Connectivity


     

    Product details

    100% Verified in the NVIDIA InfiniBand Environment to Ensure Interoperability

     

    Every 400G OSFP SR4 module undergoes rigorous compatibility tests and simulated transmission tests on the original NVIDIA ConnectX-7 OSFP Adapter Cards in the InfiniBand environment to ensure optics-to-device interoperability and perfect operation.

     

    QT-OSFP-400G-SR4-RHS compatibility test on NVIDIA ConnectX-7 OSFP Adapter Cards   

     

    Undergoes Comprehensive Performance Testing to Guarantee Optimal Reliability

     

    The QSFPTEK test center conducts complete testing procedures with advanced professional test equipment, including BER test, eye diagram test, Optical Spectrum test, jitter test, etc. Each module has been stringently tested by world-class test devices from Keysight and Anritsu to guarantee flawless operation and optimal reliability.

     

    Performance test devices  

     

    Questions & Answers

    • ALL (13)
    • QT-OSFP-400G-DR4-RHS (1)
    • QT-OSFP-400G-SR4-Flat (1)
    • 400G InfiniBand NDR (3)
    • QT-OSFP-400G-SR4 (2)
    • QT-OSFP-400G-DR4 (1)
    • QT-OSFP-400G-SR4-RHS (1)
    • QT-OSFP-400G-FR4 (1)

    Customer Reviews

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    • ALL (3)
    • Stable (1)
    • Compatibility (2)
    • High Performance (1)
    • Lenka United States of America
      2026-04-17

      Not disappointed! Works perfectly with my ConnectX-7 card so far. Stable 400G performance and great build quality. Totally worth it for high-speed networks.

      Transceivers typeMMA4Z00-NS400 OSFP SR4 | 50m | Single MPO-12/APC | Flat Top

      CompatibleNVIDIA (InfiniBand/Ethernet)

      Verified Purchase

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    • Nikola D. United States of America
      2026-03-27

      Tried it out, and the compatibility and performance are just as advertised. If I need more, I’ll definitely buy again.

      Transceivers typeMMA4Z00-NS400 OSFP SR4 | 50m | Single MPO-12/APC | Flat Top

      CompatibleNVIDIA (InfiniBand/Ethernet)

      Verified Purchase

      Helpful

      0

    • Riko Japan
      2026-02-28

      Worked no issue on ConnectX-7 OSFP NIC card, thanks Wendy for your kind support!

      Transceivers typeMMA4Z00-NS400 OSFP SR4 | 50m | Single MPO-12/APC | Flat Top

      CompatibleNVIDIA (InfiniBand/Ethernet)

      Verified Purchase

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      0

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    Resources

    • PDF Document
      QT-OSFP-400G-SR4-RHS Datasheet.pdf
    • PDF Document
      Transceiver Module User Guide.pdf
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    NVIDIA/Mellanox MMA4Z00-NS400 Compatible 400GBASE-SR4 OSFP RHS/Flat Top PAM4 850nm 50m DDM MPO-12/APC MMF Optical Transceiver Module for InfiniBand NDR (IB) and Ethernet (ETH) Used in ConnectX-7/OSFP Adapter Cards

    Compatible NVIDIA (InfiniBand/Ethernet)

    Transceivers type MMA4Z00-NS400 OSFP SR4 | 50m | Single MPO-12/APC | Flat Top

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    Mark

    2023-12-15
    This product works well with my switch, and I plan to buy some DWDM transceivers from QT. Excellent value fo ct works well with my switch, and I plan to buy some DWDM transceivers from QT. Excellent valur money!

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    NVIDIA/Mellanox MMA4Z00-NS400 Compatible 400GBASE-SR4 OSFP RHS/Flat Top PAM4 850nm 50m DDM MPO-12/APC MMF Optical Transceiver Module for InfiniBand NDR (IB) and Ethernet (ETH) Used in ConnectX-7/OSFP Adapter Cards
    US$ 459.00
    Compatible
    NVIDIA (InfiniBand/Ethernet)
    Transceivers type
    MMA4Z00-NS400 OSFP SR4 | 50m | Single MPO-12/APC | Flat Top
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    Bulk Order Quotes
    NVIDIA/Mellanox MMA4Z00-NS400 Compatible 400GBASE-SR4 OSFP RHS/Flat Top PAM4 850nm 50m DDM MPO-12/APC MMF Optical Transceiver Module for InfiniBand NDR (IB) and Ethernet (ETH) Used in ConnectX-7/OSFP Adapter Cards

    Compatible NVIDIA (InfiniBand/Ethernet)

    Transceivers type MMA4Z00-NS400 OSFP SR4 | 50m | Single MPO-12/APC | Flat Top

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